Behind The Ups And Downs On Wall Street

U.S. stocks opened slightly higher today after the Dow Jones plunged more than 320 points yesterday — the worst day in more than seven months. The S&P 500 also inched up at the open, after ending yesterday down nearly 6 percent from a recent high.

So what's up with the ups and downs? Jason Bellini of the Wall Street Journal joins Here & Now's Robin Young to discuss the drop and whether it will continue.